APA-viite

Birdsall, S. S., & Stephen S. Birdsall. (1998). An: Regional landscapes of the United States. [Washington, D.C: U.S. Dept. of State, International Information Programs.

Chicago-tyylinen lähdeviittaus

Birdsall, Stephen S., ja Stephen S. Birdsall. An: Regional Landscapes of the United States. [Washington, D.C: U.S. Dept. of State, International Information Programs, 1998.

MLA-viite

Birdsall, Stephen S., ja Stephen S. Birdsall. An: Regional Landscapes of the United States. [Washington, D.C: U.S. Dept. of State, International Information Programs, 1998.

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